Two Phase Theory
Mostrando 13-24 de 168 artigos, teses e dissertações.
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13. Propagation of waves in micropolar generalized thermoelastic materials with two temperatures bordered with layers or half-spaces of inviscid liquid
The aim of the present paper is to study the propagation of Lamb waves in micropolar generalized thermoelastic solids with two temperatures bordered with layers or half-spaces of inviscid liquid subjected to stress-free boundary conditions in the context of Green and Lindsay (G-L) theory. The secular equations for governing the symmetric and skew-symmetric l
Lat. Am. j. solids struct.. Publicado em: 2014-12
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14. A model for evaluation of effective thermal conductivity of periodic composites with poorly conducting interfaces
This paper presents a new micromechanical extension of the parametric finite-volume theory for evaluation of effective thermal conductivities of periodic unidirectional fiber reinforced composites. Such materials are assumed as composed of repeating unit cells with arbitrary internal architectural arrangements of fiber coated by thin interphase with low ther
Mat. Res.. Publicado em: 11/11/2014
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15. Dynamic pull-in instability of geometrically nonlinear actuated micro-beams based on the modified couple stress theory
This paper investigates the dynamic pull-in instability of vibrating micro-beams undergoing large deflection under electrosatically actuation. The governing equation of motion is derived based on the modified couple stress theory. Homotopy Perturbation Method is employed to produce the high accuracy approximate solution as well as the second-order frequency-
Lat. Am. j. solids struct.. Publicado em: 2014-10
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16. Solubility measurement and solid-liquid equilibrium model for the ternary system MgBr2 + MgSO4 + H2O at 288.15 K
The solubility of magnesium minerals and the refractive index of the ternary system MgBr2 + MgSO4 + H2O at 288.15 K were investigated using an isothermal dissolution method. It was found that there are two invariant points in the phase diagram and the solubility isotherm of this ternary system consists of three branches, corresponding to equilibrium crystall
Braz. J. Chem. Eng.. Publicado em: 2014-06
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17. A study on acoustic behavior of poroelastic media bonded between laminated composite panels
A study on the acoustic behavior of double-walled panels, with sandwiched layer of porous materials is presented within Classical Laminated Plate Theory (CLPT) for laminated composite panels. For this purpose, equations of wave propagation are firstly extracted based on Biot's theory for porous materials, then the transmission loss (TL) of the structure is e
Lat. Am. j. solids struct.. Publicado em: 2014
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18. Nanoestrutura de CdS: propriedades estruturais, eletrônicas e oxidação
CdS nanostructures form different shapes, with potential applications in solar cells, optical and mechanical devices. The presence of oxygen in nanostructures of these materials can be useful for obtaining new forms such as propellers, as well as for the construction of high performance devices as regards grinding. In this work, we made initially a comparati
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/08/2012
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19. Spray Forming of al Alloys: experiment and theory
Close coupled gas atomization has been studied. Pitot tube gas flow measurements support a postulate of transition from an initial sonic to a supersonic and a final sonic state along the convergence region of the jets. Predictions of the d50 median diameter utilizing a two phase model for primary and secondary break up correlate strongly with experimental re
Materials Research. Publicado em: 31/01/2012
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20. Phase transformations in an AISI 410S stainless steel observed in directional and laser-induced cooling regimes
The applications of the chromium ferritic stainless steel AISI 410S have been considerably increased in the last years in many technical fields as chemical industries and oil or gas transportation. However, the phase transformation temperatures are, currently, unknown for this alloy. The aim of this work is to determine the alpha to gamma transformation temp
Materials Research. Publicado em: 31/01/2012
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21. A RELAÇÃO ENTRE CAPITAL HUMANO E CAPITAL PSICOLÓGICO
Intangible assets received special attention from scholars in recent years in the organization context of human resource management, since theoretical proposals were developed to understand (them) and measure them. Anchored in this line of research are human capital and psychological capital. While human capital is what workers can do, the psychological capi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/10/2011
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22. O mestrado profissional em ensino de matemática e o desenvolvimento profissional de professores: um desafio institucional / The professional masters in teaching of mathematics and the professional development of teachers: an institutional challenge
This study aims to investigate and analyze the contributions of the Professional Masters in Teaching of Mathematics, PUC / SP for the professional development of teachers of Basic Education.To this end, we resort to theoretical references grounded, especially, by studying the following authors: Marcelo (2009); Ibernon (2007); Day (2001); Ponte (1998) e Gonç
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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23. Geometria e simetrias do emaranhamento
In the present work we present a geometric method to identify and measure the degree of entanglement of a two-qubit state. It is based on writing a map of the system state, from a non-unitary transformation. By introducing new parameters for such 4X4 matrix, the product of eigenvalues, two by two, acquire the form of squared 4D distances, having a Minkowski
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2011
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24. Comportamento crítico da produção de entropia em modelos com dinâmicas estocásticas competitivas / Critical behavior of entropy production in models with competitive stochastic dynamics
We study kinetic phase transitions and the critical behavior of the entropy production in spin models with nearest neighbor interactions subject to two Glauber dynamics, which simulate two thermal baths at different temperatures. In this way, it is assumed that the system corresponds to a continuous time Markov process which obeys the master equation. Thus,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2011